详解通过docker和docker-compose实现eureka高可用_奈斯博客

这篇文章主要介绍了详解通过docker和docker-compose实现eureka高可用，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

最近新项目有使用到springcloud 和docker，关于这两个技术就不分别介绍了，现在分享一下通过docker,docker-compose实现eureka高可用的方案。

1. eureka server项目目录结构：

2. eureka 配置文件配置：

  server:   port: 8900    spring:   application:    name: eureka-server   profiles:    active: dev    management:   security:    enabled: false   health:    rabbit:     enabled: false    ---  spring:   profiles: dev    eureka:   client:    serviceUrl:     defaultZone: http://localhost:${server.port}/eureka/    register-with-eureka: false    fetch-registry: false   instance:    hostname: localhost    prefer-ip-address: true    ---  spring:   profiles: test_ha_1    eureka:   client:    serviceUrl:     defaultZone: http://eurekaserver2:${server.port}/eureka/   instance:    hostname: eurekaserver1  #  prefer-ip-address: true 该配置为true表示注册到eureka上的是IP，如果这样的化，eureka服务器就不能通过服务器发现Replicas。  #               故如果想通过Docker实现eureka高可用，该配置最好使用默认值（false）  #               此处配置为true且实现高可用也不是没有办法，就是每个eureka服务需映射到Docker环境外，且知道ip。  ---  spring:   profiles: test_ha_2    eureka:   client:    serviceUrl:     defaultZone: http://eurekaserver1:${server.port}/eureka/   instance:    hostname: eurekaserver2  #  prefer-ip-address: true

3. docker maven插件配置：

   <build>      <plugins>        <plugin>          <groupId>org.springframework.boot</groupId>          <artifactId>spring-boot-maven-plugin</artifactId>        </plugin>        <plugin>          <groupId>com.spotify</groupId>          <artifactId>docker-maven-plugin</artifactId>          <version>0.4.13</version>          <configuration>            <imageName>${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>            <dockerDirectory>src/main/docker</dockerDirectory>            <forceTags>true</forceTags>            <resources>              <resource>                <targetPath>/</targetPath>                <directory>${project.build.directory}</directory>              </resource>            </resources>          </configuration>          <!--<groupId>com.spotify</groupId>          <artifactId>docker-maven-plugin</artifactId>          <version>0.4.13</version>          <configuration>            <imageName>itmuch/${project.artifactId}:${project.version}</imageName>            <forceTags>true</forceTags>            <baseImage>java</baseImage>            <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>            <resources>              <resource>                <targetPath>/</targetPath>                <directory>${project.build.directory}</directory>                <include>${project.build.finalName}.jar</include>              </resource>            </resources>          </configuration>-->        </plugin>      </plugins>    </build>

4. Docker file 文件内容：

  FROM java:8    ADD eureka-server-1.0.0.jar eurekaserver.jar  ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/eurekaserver.jar"]

5. 生成 eureka server 镜像：

通过执行 mvn clean package docker:build 命令，生成eurekaserver镜像，如下：

6. 通过docker-compose 编排：

  version: '2'  services:   eurekaserver1:    image: raynspace/eureka-server:1.0.0    ports:     - "7900:8900"    environment:     - spring.profiles.active=test_ha_1     eurekaserver2:    image: raynspace/eureka-server:1.0.0    #hostname: eurekaserver2    ports:     - "7800:8900"    environment:     - spring.profiles.active=test_ha_2

7. 跳转至项目目录下，执行docker-compose up 命令，自动生成eureka server 两个容器：